<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>BOM</title>
</head>
<body>

        <a href="index.html">index</a>
        <a href="list.html">list</a>
        <a href="page.html">page</a>
        
        <button onclick="f()">前进</button>
        <button onclick="b()">后退</button>
    

    <script src="script.js"></script>
</body>
</html>